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If the bake still works but the broiler does not, there is nothing that can cut out the broiler separately other than the broil element itself, or the relay on the display control board. The board is part number WB27X5579 and it's no longer made so if you wanted to fix the issue and the element is good, you'd have to send the old display board into a place like ApplianceTimers.com to have the board refurbished. It usually takes about 2 weeks and costs about $150.
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I have told you how to fix the problem, and you are paying for my time. Keep in mind I make a living just as you do and if everyone stiffed you then you would have nothing to live on. You now know what the problem is and I have told you exactly how to go about fixing the part since they no longer make the part. I can't control what fails or whether a part is made or not. I certain will not help you in the future if this is how you are going to treat someone who is trying to help and make a living.